Formation of spent concentrated chromium-containing solutions and electrolytes in the exploitation and correction of hard chrome-plating, passivation, and etching baths

Journal Article · Thu Mar 10 00:00:00 EST 1988 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6362541

Afonskii, S S; Gubskaya, E S; Chemel', L L; Kublanovskii, V S

The development of efficient methods for the purification, regeneration, and also the utilization of chromium-containing wastes from galvanic production requires knowledge of the rules governing the changes in their chemical composition and properties during the exploitation of actual working baths. In order to determine the chemical composition of spent chromium-containing solutions and electrolytes, and also the useful life of working baths, we have studied the working conditions of the most typical production baths for hard chrome-plating, passivation, and etching. The chromium(VI) and chromium(III) content, as well as the content of the cations and anions Fe(III), Cu(II), Cd(II), Zn(II), and SO/sub 4//sup 2 -/ was determined by volumetric, calorimetric, and atomic absorption methods. The change in the pH of the solutions was measured with a pH-121 instrument. The data obtained served as the basis for the development of methods for the recovery and utilization of spent chromium-containing solutions and electrolytes, leading to the creation of a low-waste technology.

• OSTI ID: 6362541
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 60:9; Other Information: Translated from Zh. Prikl. Khim.; 60: No. 9, 2116-2119(Sep 1987)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CHROMIUM COMPOUNDS
MATERIALS RECOVERY
ELECTROLYTES
RECYCLING
ELECTROMETALLURGY
WASTE PRODUCT UTILIZATION
ABSORPTION SPECTROSCOPY
CADMIUM
CALORIMETRY
COPPER
ELECTROPLATING
ETCHING
INDUSTRIAL WASTES
PASSIVATION
PH VALUE
VOLUMETRIC ANALYSIS
WASTE MANAGEMENT
ZINC
CHEMICAL ANALYSIS
DEPOSITION
ELECTRODEPOSITION
ELECTROLYSIS
ELEMENTS
LYSIS
MANAGEMENT
METALLURGY
METALS
PLATING
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
RECOVERY
SPECTROSCOPY
SURFACE COATING
SURFACE FINISHING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTE PROCESSING
WASTES
360101* - Metals & Alloys- Preparation & Fabrication
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management